Millcreek Power Generation
Natural gas power plant · Washington County, Utah
Nameplate capacity
80 MW
Rank in Utah
#34
of 131 plants
In service since
2006
April 2006
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Fired Combustion Turbine
- Operator
- City of St George
- County
- Washington County
- Generating units
- 2
- Share of state capacity
- 0.70%
- Rank among natural gas plants in Utah
- #7 of 23
- EIA plant code
- 56253
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| MC1 | Natural Gas Fired Combustion Turbine | 40 MW | 37 MW | 2006 | Operating |
| MC2 | Natural Gas Fired Combustion Turbine | 40 MW | 37 MW | 2010 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Utah
| Iron Springs BESS | Battery storage | 80 MW |
| Iron Springs Solar, LLC | Solar | 80 MW |
| Rocket Solar, LLC | Solar | 80 MW |
| Sigurd Solar LLC | Solar | 80 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 80 MW solar plant and a 80 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Utah power plants · What Utah actually generates